Harvester



UNITED STATES PATENT OFFICE.

JOHN F. STEWARD, CHICAGO, ILLINOIS.

HARVESTER.

SPECIFICATION forming part of Letters Patent. No. 315,567, date-d April1(1, 1885.

Application filed Marcih1,1 884. (No model.)

To all whom it may concern/.-

Be it known that I, JOHN F. STEWARD, of Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Harvesters, of which the fol lowing is a full description, referencebeing had to the accompanying drawings.

The object of myinvention is to improve the raising and lowering devicedescribed and claimed in Patent No. 257,562, May 9, 1882, to Steward andDixon, and its nature will be fully pointed out.

In the drawings, Figure l is a perspective View showing the parts as ifseen from a point above and somewhat to the left." Fig. 2 is a sectionalplan view.

A and A. are the ordinary gear-sills of a harvester. To the sill A isbolted the curved loop-shaped bracket A, in which the teeth A areprovided.

B is the master-wheel; (Shown only in dotted lines, but clearly enoughto show its relation to the parts with which in practice it isassociated.)

B is the hub, upon which is the gear B, for giving motion to theharvester-gearing.

B is a spur'pinion keyed to the shaft E. E is a bevel-gear keyed to thesameshaft, and adapted to mesh with the pinion F on the shaft F.

G is the gear-frame, having the bearings G,

G and G for the shafts E and F.

O is the axle upon-which the traction-wheel freely revolves. Upon eachend of the axle a pinion is firmly secured. (But one, however, is hereshown.) As one piece with the pinion D is the gear D, of diameterpreferably not greater than that of gear B I make all of the parts of mydevice as light as possible, and to do this I make the gear D ofmalleable cast-iron.

In the patent above referred to the gear D is shown as secured to theaxle-pinion upon the opposite side of the wheel from the gear 13*, andthus exposed to danger, outstanding, as it does, from sheltering parts.Its lightness would be its weakness if unprotected. The gear B will nowbe treated in its capacity as a protection to gear D,whichit well forms,being strong in proportion to its labor-that of driving theharvester-gearing--andthusstrong,beingcompetent to resist the shocksincident to a wheel itacts' as a disk substantially equal to or greaterin diameter than the light gear D, placed upon the axis of the latter,and thus compelled to rise and fall simultaneously, and at all timestopreserve proper relation. The protection afforded is akin to that of acircular saw, when, by means of a bolt inserted through its -eye, it issecured beside a disk of wood of equal size for shipment. Althoughwholly exposed on one side, it can but be forced against the disk, anddanger cannot approach it from the other side. The gear thus forms,although, strictly speaking, not a perfect, yet avery effective shield.

It is not by the mere transposition of the gear D that the feature ofprotection is intro duced, because, if a disk were placed beside thesimilar gear in the patent referred to, this feature of my improvementwould be applied to that. p

I make the bearing G as long as possible, making that part Grcylindrical and project it well out beyond the margin of the frame. On

dius of the sector A is equal to the sum of the insuch an exposedposition,from careless drivthis sleeve G I place the pinion I. Therapinion B so that as the axle O is moved up or down in'saidsector-bracket the mesh of the gears is undisturbed, and I make the sumof the radii of the gears D and pinion I equal that of B and B It isplain that if I be rotated the axle'pinion will be rolled relatively upor down in the sector-bracket. The master-wheel resting on the ground,however, the frame must rise and fall. i

For convenience in rotating the pinion I, gearing is provided, thebevel-gear I being made as one piece with I.

H H are bearings on the frame G, in which the shaft K may rotate.

- On the shaft K, I place the pinion K in proper position to mesh withthe gear I. I

K is a crank by which thelast-named'shaft I ICO 8o radii of thepitch-circles of the gear B and the forming a common axis for said gearand pinion, and the gear 13 the frame G having the sleeve G adapted toform a support in commen for the pinions B and I all combinedsubstantially as described.

2. The frame G, constructed and arranged substantially as described,whereby it is adapt- 20 ed to form a support in common for the shafts EF K and the gear I, as set forth.

3. The combination, with the gear D, of the gear-wheel B when adapted toperform the office of a protecting-disk supported on the 25 axle, andthus adapted to rise and fall with said gear-1D and form a protectionthereto, substantially as described.

JOHN F. STEXVARD.

Vitnesses:

E. '1. GADDIS, 7M. A. JOHNSON.

